support autotranslation for clojure

[scottdraves]

%%clojure
(beakerx :set "foo" 1)

should work. similarly, if you do this in JS:

beakerx.person = [{firstName:"John", lastName:"Doe", age:26}, {firstName:"Amanda", lastName:"Smith", age:33}]

then this should work:

%%clojure
(((beakerx :get "person") 1) "firstName")

[scottdraves]

see https://github.com/twosigma/beaker-notebook-archive/blob/1.7.1/plugin/clojure/src/main/resources/init_clojure_script.txt